Your chipset drivers (via or nForce) should be in the add/remove programs.
edit: just realized you are installing a new mobo... Usually you can't boot with a new mobo switch without reformating... for me at least. What do you guys think?
Switching a motherboard is essentially the same process as moving your harddrive to a new box. You can quite frequently pop a harddrive into a new box and have it set up just fine. However, generally you want to replace any specialty drivers with generic ones before you do so, and keep in mind that some systems just won't work at all (I had one system that refused to read the boot sectors of one of my harddrives, and the only way around that was to format it)